Adjustable primary air supply for wood burning device

F - Mech Eng,Light,Heat,Weapons – 23 – N

Patent

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Details

F23N 3/04 (2006.01) F23N 5/04 (2006.01)

Patent

CA 2510417

An adjustable primary air supply for wood burning device comprises at least one but preferably two thermostatic bimetal elements which, by bending with temperature variations, directly actuate a flap That opens and closes the air entry opening. Primary Air is the air used to control the bum rate and it is adjusted in order to achieve the desired bum rates and Secondary Air is the air used to complete the combustion and is not adjustable. Using these two sources of air, the invention consists of a device, which allows the primary air supply to remain open until proper burning is established. Therefore, when the temperature of the appliance rises, the combustion air gradually decreases to its preset value by having the primary air supply automatically shut oft as temperature increases. A higher temperature indicates that the wood is sufficiently hot to decompose into flammable gases, so only secondary air is required to continue the combustion process.

Cet appareil est une source d'air primaire réglable pour appareil de chauffage au bois qui comprend au moins un mais de préférence deux éléments métalliques thermostatiques qui, en s'adaptant aux variations de température, actionnent directement un volet qui ouvre et ferme l'ouverture de l'entrée d'air. L'air primaire est utilisé pour déterminer le taux de combustion et il est réglé afin d'obtenir le taux désiré et l'air secondaire sert à compléter la combustion et n'est pas réglable. L'invention, qui recourt à ces deux sources d'air, se compose d'un dispositif qui permet à la source d'air primaire de demeurer ouverte jusqu'à ce que le taux de combustion adéquat soit obtenu. En conséquence, lorsque la température de l'appareil monte, l'air de combustion baisse graduellement à sa valeur préétablie par la fermeture automatique de la source d'air primaire alors qu'augmente la température. Une température plus élevée indique que le bois est suffisamment chaud pour se décomposer en gaz inflammables; ainsi, seul l'air secondaire est requis pour poursuivre le processus de combustion.

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